256650211 has 2 divisors, whose sum is σ = 256650212. Its totient is φ = 256650210.

The previous prime is 256650197. The next prime is 256650257. The reversal of 256650211 is 112056652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256650211 - 2¹⁷ = 256519139 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256650211.

It is not a weakly prime, because it can be changed into another prime (256650281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128325105 + 128325106.

It is an arithmetic number, because the mean of its divisors is an integer number (128325106).

Almost surely, 2^256650211 is an apocalyptic number.

256650211 is a deficient number, since it is larger than the sum of its proper divisors (1).

256650211 is an equidigital number, since it uses as much as digits as its factorization.

256650211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 256650211 is about 16020.3062080598. The cubic root of 256650211 is about 635.4975421477.

The spelling of 256650211 in words is "two hundred fifty-six million, six hundred fifty thousand, two hundred eleven".